This updated member of the Kimber Custom Shop Collection is designed for competition with all-new features and an accuracy guarantee of 5 shots, 25 yards, 1-inch group or less. FeaturesAmbidextrous thumb safetyRecoil spring (pounds): 16.0Full-length guide rodAccuracy Guarantee of 5-shots, 25-yards, 1-inch group or less30 lines-per-inch front strap checkering30 lines-per-inch checkering under trigger guardAggressive slide serrationsSerrated flat top slide